Wont Start

Step 9 - An automotive exhaust system is designed to direct the exhaust gases from the engine to be transferred to the rear of the vehicle. Disconnect the exhaust system before the catalytic converter and crank it over, if the engine starts the car has a plugged converter or exhaust system. Disassemble the exhaust system to inspect to replace the exhaust component that has failed.

Plugged Catalytic Converter

Step 10 - Usually a plugged air filter or broken air intake boot doesn't cause the engine to not start, but to just run poorly, but in extreme cases these components can cause the engine to not start.

Plugged Air Filter

Helpful Information

For an engine to run three things must occur inside the engine, compression, fuel and ignition at the right time, without any one of these components the engine will not run. Engine compression caused by crankshaft rotation and pistons moving up and down inside the engine block. If the timing belt or timing chain fails it will cause the camshaft to become out of correlation with the crankshaft or allow the camshaft to stop rotating. Either of these conditions will cause the engine to lose compression and cause internal engine damage. Proper maintenance such as engine tune up's are needed to stem engine no start conditions.

Best Practices

  • Check the easiest systems first.
  • Observe engine cranking patterns to detect possible malfunctions.
  • Use quality replacement parts to ensure proper operation without premature failure.


Written by
Co-Founder and CEO of
35 years in the automotive repair field, ASE Master Technician, Advanced Electrical and Mechanical Theory.


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Article first published (Updated 2014-10-24)